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> Aviation aluminum material, warm white, exquisite appearance, stain less steel hanger, anti-corrosion,perfect for outdoor environments in most climates. > Simple installation with PoE, maximum connection distance up to 100 meters.Embedded network port, not easy to break, easy to plug and unplug. > Supports multiple network protocols for easy configuration,support ONVIF protocol, horn can carry out information scanning, broadcasting, intercom,upport standard SIP protocol, can use intercom function with standard SIP system,Support viewing and modifying the software parameters of the horn through the web page. > Storage: 512MB and support TF card. > Support auxiliary input, insert 24V adapter, ordinary switch can also be used. > Support one-key reset (1 reset button).